Deck up your party space using our Balloonify Black Mylar Letter S Balloon. Fashioned in the shape of "S," this letter balloon can be put together with other Balloonify numbers and letters to curate different words. The premium mylar build of this foil balloon makes it highly durable and moistureproof. With a self-sealing valve, this balloon decoration makes it airtight, keeping it in proper shape and size. Conveniently place this graduation balloon on the ceilings, as they come with hanging loops. With a striking black finish, this happy anniversary balloon gives a majestic look to your party hall. Inflate this custom balloon using a hand pump to simplify the process. Measuring 16 inches when inflated, this reusable party balloon can be filled with air or helium. To reuse this balloon, gently deflate, properly store, and carefully reinflate without overfilling. Shipped deflated in a 1 count box. This party balloon can be easily inflated with the included straw, providing you with full control to help eliminate the risk of over-inflation. Electric air balloon pump (SKU: RWP1061) is available and sold separately.